Tektronix 454A - Page 129

Eq ui p
ment R e q ui r e d
1 . H i g h - F
r e qu
e n cy Co
nst ant - Amp l i t u d e Si gnal Gener a-

7 . GR 5 N anosecond Ca b l e
f or ( 067- 0532- 01)
2 .
M e d i u m-
F
r e qu ency Const ant - Ampl i t ud e Si gnal
Gener at or
( Ty p e 191)
3 . L ow- F r equency Si gnal Gener at or ( Gener al R ad i o
1310- zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA ‘ )

10 . G R 50 © I n- Li ne Ter mi n at i on
4 . Ti me- M ar k Ge n er at or ( Ty pe 2901)

11 . BN C 50 © I n- Li ne Ter mi nat i on
5 . CT- 3 Si gnal P i c k of f

12 . GR 50 © 10 § At t enuat or
6 .
10 § P r obe

13 . BN C ¤ - Connect or
Cont r ol Set t i ngs

f
.
Set t h e ‘ T R I GG ER I NG SO UR CE swi t c h
t o EXT .
P
r eset i nst r ument cont r ol s t o t he
set t i ngs gi ven und er
P r el i mi nar y
Cont r ol Set t i ngs .
19 . C h ec k ‘ an d ’ L ow- F r e q uency
Tr i gger i ng
O p er at i on
± . Connect t he ou t p
ut of t he me d i u m- f r eq u
ency
const a
n t - am p l i t u d e si gnal ge n er at or
( Ty p e 191) t o t he CH 1
i n p u t connect or
t
h
r o ugh ± 5 n an oseco nd cabl e,
± GR 50 ©
i n- l i ne t er mi nat i on an
d ± BN C ¤ - connect or .
b . Connect
an 18- i nc h 50 © BN C ca b l e f r om
t he un use d
en d of t he BN C¤ - co n
nect or t o t he ‘ • §¤ T R I G I NPU
T
connect or .
TR I GG ER
SYST EM C HE C K
8 . Two 42- i nc h 50 © BN C Ca b l es
9 . 18- i nc h 50 © BN C Ca b
l e
P er f or mance C h ec k - 454A/ R 454A
g . C HE C K- R ep eat ch ec k st e p
e .
M
ust be a b l e t o t r i gger
bot h
+
an d - i n al l p osi t i ons of t he T R I GG ER I N
G CO U -
PL I N
G swi t c h
.
h . Set t he H
O
R I Z
DI S PL AY swi t c h t o ’ ( D EL AY E D
S WEEP) .
i . C HE CK - T h
at
±
st abl e d i s p l ay can be obt ai ne d by
a dj ust i ng t he ‘ T R I GG ER I N
G LEVEL cont r ol i n bot h t h e
+ an d - p osi t i ons of t h e
T
R I GG ER I N
G SL O PE swi t c h .
R
ep eat ch ec k f or eac h p osi t i on of t h e T R I GG ER I
NG
CO
UPL I N
G swi t c h .
j . R
emove t he 18- i nc h 50 © BN C ca b l e f r om t he ‘ • §¤
c . Set t he CH 1 V
O L TS/ DI V swi t c h t o 1, t he ‘
an
d
’

TR I G I NPU T
connect or an d r e- i nst al l i t on t he ’ • §¤
TR I GG ER I N G LEVEL
cont r ol s f u l l y cl oc k wi se an d t h e ‘

T R I G I NPU T connect or .
an d ’ ¤™œ• / DI V swi t c h es t o
20 ¼ s
.
k .
Set t h e ’ T R I GG ER I N G SO UR C E swi t c h t o
EXT .
d . A d j u st t he medi um- f r e
qu en cy si gnal gener at or f or 0 . 3
d i vi si on of d ef l ect i on of t h e 50 kH
z r ef er ence si gnal .
™ . C HE C K- R ep eat c h ec k st e p i . M ust b e a b
l e t o t r i gger
b ot h
+
and - i n al l p osi t i o n s of t he TR I GG ER I N
G CO U -
e . C HE CK - T h
at ± st abl e di s p l ay can be o b t ai ne d b y

PL I N
G swi t c h .
a d j u st i ng t he ‘ T R I GG ER I N G LEVEL
cont r ol i n bot h t he
+
an d -
posi t i ons of t he TR I GG ER I N G SL
O
PE
swi t c h .
R e p eat c h ec k f or eac h p
osi t i on of t he T R I GG ER I NG

m
.
I ncr ease t he out p u t f r e q uency of t he
medi um-
COUPLI NG swi t c h .

' f r e q uency si gnal
gener at or t o 20 mega h er t z .
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